Bought this as a replacement mattress for our sleeper sofa.  Was concerned that it wouldn't fit or that it wouldn't be comfortable but took a chance and bought it anyway because we had guests coming. We're so happy we did!! Even though we were concerned that it was a bit larger than we thought would fit folded up in the sofa, it folded up perfectly.  And it's much more comfortable than the original air mattress the sofa came with. All of the visitors who have slept on it give it rave reviews.